@Don McErlean If these are the three locomotives that sold on the "bay" on the 6th of April ( from Connecticut ) then these are Hornby clockwork bodies fitted with, I think, Marx power units
Hornby always had "Spade" pickups such as below ( I am pretty sure you already know this tho lol )
A trio of fun units nevertheless I thought of having a go at them , but postage was waaaaay too much for this Aussie